306 Twelfth Street
306 Twelfth Street, between Fifth and Sixth Avenues · Park Slope
Park Slope, Brooklyn
BBL 3010297502 · BIN 3392418
- Type
- Condominium
- Amenities
- Porter; bicycle storage with street access; private outdoor space; in-unit laundry
- Landmark status
- Not an individual landmark; not in a historic district
- NYC Landmarks Preservation Commission and City Planning records, updated February 2026
- Pets
- Pets permitted; species and limits not stated
Every recorded sale at this building, 2007–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf, 2026 to date
- $1,152
- 1 sale
- Listing discount
- 2.3%
- Recorded sales
- 13
- On record
- 2007–2026
Own an apartment here? See what it would sell for.
A Private Pricing Opinion — what your apartment at 306 Twelfth Street would likely sell for today, what it costs to sell, and what you’d walk away with — reviewed personally against condition, exposures, renovation quality, and the competition actually on the market.
About the building
306 Twelfth Street is a four-home condominium built during South Slope's expansion of small infill developments in the 2000s. John Hatheway Jr. filed the new-building design, which received its permit in March 2006 and final signoff in January 2009. The building has four principal stories and a compact residential inventory on a side street between Fifth and Sixth Avenues. Its 25-year tax benefit remains part of the carrying-cost structure.
The apartment types include a garden duplex, intermediate floor-through homes and a penthouse duplex. The garden accommodation combines two bedrooms with a lower recreation level and opens to a deep, south-facing backyard. Uppermost accommodation includes three bedrooms, a terrace and a private roof deck. Intermediate homes have smaller outdoor areas. The building also provides bicycle storage accessible directly from the street, while a porter handles common-area work.
Pets and in-unit washer/dryer
- Pets
- Pets permitted; species and limits not statedSource: The Roebling Team's building profile
- In-unit washer/dryer
- Not verified
Considering an apartment here? Send Corey the listing to confirm the pet and washer/dryer rules for that apartment.
Own an apartment here? Request an apartment-specific pricing review.
Building staffing and amenities
- Amenities noted
- Bike storageSource: The Roebling Team's building profile
Staffing and amenities as our building profile and recent listing records describe them. A feature not listed is not confirmed absent. Outdoor space, parking and some facilities can belong to particular apartments or to a separate owner; confirm access for the specific apartment.
Local Law 97
This building is below the 25,000 sq ft threshold at which LL97 limits apply to a building on its own. It is still covered if it shares a tax lot or condominium board with buildings totaling over 50,000 sq ft; confirm on DOB’s covered-buildings list.
See full Local Law 97 analysis →Recent sales
Recent closings at this building, from The Roebling Research Library. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Jul 2, 2026 | 1 | 3 BR · 2.5 BA · 1,715 sf | $1,975,000 | $1,152/sf | +12.9% |
| Nov 24, 2020 | 3 | 2 BR · 2 BA · 1,034 sf | $1,120,075 | $1,083/sf | -10.4% |
| Jun 22, 2017 | 3 | 2 BR · 2 BA · 1,034 sf | $1,250,000 | $1,209/sf | +8.7% |
| Dec 12, 2016 | 4 | 3 BR · 1,194 sf | $1,335,000 | $1,118/sf | +11.3% |
| Jul 31, 2015 | 1 | 2 BR · 1,715 sf | $1,521,000 | $887/sf | -1.9% |
| Jul 11, 2012 | 4 | 3 BR · 1,194 sf | $995,000 | $833/sf | -4.3% |
| Mar 9, 2012 | 3 | 2 BR · 2 BA · 1,034 sf | $689,000 | $666/sf | — |
| Nov 18, 2008 | 2Sponsor Sale | 2 BR · 1,034 sf | $685,000 | $662/sf | -2.0% |
Market read. Most recent trades (2026 to date) cleared a median $1,152/sf (recorded) across 1 sale. Median listing discount 2.3% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-01029-7502; each condominium apartment is its own tax lot). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.
What would your apartment rent for?
Enter your apartment and I'll send you what it would rent for, from comparable closed leases at 306 Twelfth Street and nearby.
Buying here? Condo closing costs with a mortgage typically run 3 to 6% of the price. See NYC co-op and condo closing costs, line by line.
Keep up with 306 Twelfth Street and its market
The Roebling Report, monthly: Manhattan sales data and analysis, including buildings like 306 Twelfth Street. Unsubscribe anytime.
We’ll use your email for The Roebling Report and note your interest in this building. See our privacy policy.
What to know if you’re buying
Four residences share capital expenses. A façade or roof project has few owners over whom to spread the cost, and decisions depend on a small association. Mortgage lenders may apply extra review to a condominium with this limited unit count.
Comparable buildings
- 276 Thirteenth Street: A nearby 2000s condominium with an elevator, more residences and a similar long-term tax-benefit program.
- 267–273 First Street: A small elevator condominium whose original sales also followed the 2000s development cycle.
- 392 Eleventh Street: A taller small condominium with an expired tax benefit, useful for comparing current carrying costs.
More Park Slope buildings
- 300 8th Avenue, 300 Eighth Avenue — 1920 co-op
- 301 Fifth Avenue — 1920 co-op
- 303 Sixth Avenue — 1920 co-op
- 308 14th Street — 2024 condominium
- 309 2nd Street (The Heritage at Park Slope) — 2008 condominium by Karl Fischer Architects
- 309 Sixth Avenue, 309 Sixth Avenue · Park Slope — 1940 co-op
The neighborhood
For the full neighborhood — its buildings, character, and market — read The Roebling Team Guide to Park Slope.
How to read the facts on this page. Items attributed to an offering plan describe the building as it was offered at that filing — unit mix, square footage, the amenity program as planned. They are not a statement about how the building operates today. Tax and compliance figures are sourced separately to current City records and carry their own dates. House rules, staffing and fee policy can change by board resolution without any public filing: treat every policy line here as a starting point for diligence and confirm it with the managing agent. Where this page compares one building or neighborhood to another, that is our analysis of the recorded record — it names the measure, the period and the sample it rests on, and it is an observation about medians rather than a prediction about any particular apartment.
Considering a move at 306 Twelfth Street?
Request a private building brief with the relevant comparable sales, current and off-market availability, and an apartment-specific view of value.
646.939.7375 · c.cohen@compass.com